Color conversion member and display device comprising same

Abstract

A color conversion member includes: a first sub-partition part having a width which decreases from a first surface toward a second surface; a second sub-partition part disposed on the first sub-partition part and having a width which increases from the first sub-partition part toward the second surface; and a partition part which is disposed on the second sub-partition part and includes a liquid-repellent part including a liquid-repellent additive.

The invention claimed is: 
     
         1 . A color conversion member comprising:
 a base layer;   a plurality of partition parts spaced apart from each other on the base layer; and   a color control part disposed between the partition parts,   wherein each of the partition parts has a first surface adjacent to the base layer, a second surface opposite to the first surface, and a third surface connected between the first surface and the second surface, wherein the third surface includes a recessed portion,   wherein the third surface has a surface energy greater than a surface energy of the color control part, and the second surface has a surface energy less than the surface energy of the color control part, and   wherein each of the partition parts comprises:
 a first sub-partition part having a width which gradually decreases in a direction from the first surface to the second surface; 
 a second sub-partition part disposed on the first sub-partition part and having a width which gradually increases in a direction from the first sub-partition part to the second surface; and 
 a liquid-repellent part disposed on the second sub-partition part and comprising a liquid-repellent additive. 
   
     
     
         2 . The color conversion member of  claim 1 , wherein
 the liquid-repellent part has a surface energy less than the surface energy of the color control part, and   each of the first sub-partition part and the second sub-partition part has a surface energy greater than the surface energy of the color control part.   
     
     
         3 . The color conversion member of  claim 1 , wherein a top surface of the liquid-repellent part is the second surface, the second surface has the surface energy less than the surface energy of the third surface, and a difference between the surface energy of the second surface and the surface energy of the third surface is equal to or greater than about 10 dyn/cm. 
     
     
         4 . The color conversion member of  claim 1 , wherein
 when a connected portion between the first sub-partition part and the second sub-partition part has a width of W 1 , and the second sub-partition part has a maximum width of W 2 , W 1  and W 2  satisfy the following inequation:
   1.5 μm≤ W   2   −W   1 ≤3.5 μm.
 
   
     
     
         5 . The color conversion member of  claim 1 , wherein when a connected portion between the first sub-partition part and the second sub-partition part has a width of W 1 , the second sub-partition part has a maximum width of W 2 , and a maximum height in a thickness direction of each of the partition parts is H BK , W 1 , W 2  and H BK  satisfy the following inequation:
   0.1≤( W   2   −W   1 )/ H   BK <0.48.
   
     
     
         6 . The color conversion member of  claim 1 , wherein on a cross-section of each of the partition parts perpendicular to the base layer, a maximum width W 3  of the first sub-partition part is equal to or greater than a maximum width W 2  of the second sub-partition part. 
     
     
         7 . The color conversion member of  claim 1 , wherein when a maximum height in a thickness direction of each of the partition parts is H BK , and a maximum height in a thickness direction of the color control part is HCP, HBK and HCP satisfy the following inequation:
   0.7 *H   BK   ≤H   CP ≤1.3 *H   BK .
   
     
     
         8 . The color conversion member of  claim 1 , wherein
 a height in a thickness direction of each of the partition parts is equal to or greater than about 5 μm and equal to or less than about 20 μm, and   a height of the second sub-partition part is two times or more of a height of the first sub-partition part.   
     
     
         9 . The color conversion member of  claim 1 , wherein each of the partition parts further comprises a third sub-partition part disposed between the second sub-partition part and the liquid-repellent part and having a width which gradually decreases in a direction from the second sub-partition part to the liquid-repellent part. 
     
     
         10 . The color conversion member of  claim 9 , wherein an edge of a top surface of the third sub-partition part is a curved surface. 
     
     
         11 . The color conversion member of  claim 9 , wherein on a cross-section of each of the partition parts perpendicular to the base layer,
 the third sub-partition part comprises a flat portion having a flat top surface and a curved portion disposed on a side surface of the flat portion, and   the curved portion has a width which gradually decreases in the direction from the second sub-partition part to the liquid-repellent part.   
     
     
         12 . The color conversion member of  claim 11 , wherein the curved portion comprises:
 a first curved portion disposed at one side of the flat portion; and   a second curved portion symmetric to the first curved portion based on the flat portion and disposed at an opposing side of the flat portion.   
     
     
         13 . The color conversion member of  claim 11 , wherein when, on the cross-section, the second sub-partition part has a maximum width of W 2 , and the curved portion has a maximum width of W CP , W 2  and W CP  satisfy the following inequation:
     W   CP ≤0.4 *W   2 .
   
     
     
         14 . The color conversion member of  claim 11 , wherein an edge of a top surface of the color control part overlaps the curved portion. 
     
     
         15 . The color conversion member of  claim 9 , wherein when a maximum width of the second sub-partition part is W 2 , and a maximum height from the second sub-partition part to a top surface of the third sub-partition part is H C , W 2  and H C  satisfy the following inequation:
   0 ≤H   C /( W   2 /2)≤0.5.
   
     
     
         16 . The color conversion member of  claim 9 , wherein a height in a thickness direction of the third sub-partition part is about 30% or less of a height in a thickness direction of each of the partition parts. 
     
     
         17 . The color conversion member of  claim 9 , wherein each of the partition parts further comprises:
 a fourth sub-partition part disposed on the third sub-partition part and having a width which gradually decreases in a direction from the third sub-partition part to the liquid-repellent part; and   a fifth sub-partition part disposed between the fourth sub-partition part and the liquid-repellent part and having a width which gradually increases in the direction from the third sub-partition part to the liquid-repellent part.   
     
     
         18 . The color conversion member of  claim 17 , wherein when a connected portion between the fourth sub-partition part and the fifth sub-partition part has a width of W 4 , the fifth sub-partition part has a maximum width of W 5 , and a distance in a thickness direction from the third sub-partition part to a maximum height of the partition part is H BK-3 , W 4 , W 5  and H BK-3  satisfy the following inequation:
   0.1≤( W   5   −W   4 )/ H   BK-3 <0.48.
   
     
     
         19 . The color conversion member of  claim 1 , wherein the liquid-repellent additive is a copolymer comprising a perfluoropolyether (PFPE) derivative as a side chain. 
     
     
         20 . The color conversion member of  claim 1 , wherein a weight of the liquid-repellent additive is equal to or greater than about 0.01 wt % and equal to or less than about 10 wt % based on a total weight of each of the partition parts. 
     
     
         21 . The color conversion member of  claim 1 , wherein on a cross-section of each of the partition parts, a side surface of the second sub-partition part has an inclined angle greater than about 90° to the base layer. 
     
     
         22 . The color conversion member of  claim 1 , wherein the color control part comprises a quantum dot. 
     
     
         23 . The color conversion member of  claim 1 , wherein the color control part comprises:
 a first color control part which transmits first color light therethrough;   a second color control part comprising a first quantum dot which converts the first color light into second color light in a longer wavelength region than the first color light; and   a third color control part comprising a second quantum dot which converts the first color light into third color light in a longer wavelength region than each of the first color light and the second color light.   
     
     
         24 . The color conversion member of  claim 1 , wherein each of the partition parts comprises a pigment or a dye. 
     
     
         25 . The color conversion member of  claim 1 , further comprising:
 a color filter layer disposed between the base layer and the color control part,   wherein the color filter layer comprises:
 a plurality of light shielding parts; and 
 a filter disposed between the light shielding parts. 
   
     
     
         26 . The color conversion member of  claim 25 , wherein the light shielding parts overlap the partition parts, respectively.